It's just a natural progression. When the company is a startup working on a new exciting tech it's chasing the dream and changing the world. When it's a behemoth employing 200k people, it's impossible for all of them to be chasing the dream. Probably like 90% of them would be doing extremely boring "keeping the lights on" tasks and ensuring this gargantuan machine does not go to pieces under it's own weight. It still can pay incredibly well, but it won't be exciting frontier work anymore. It just can't be, 200k people company can't move with the agility of 200 people company.